Difference between revisions of "ansible loop fail"
From thelinuxwiki
(→Example Play) |
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| Line 44: | Line 44: | ||
</source> | </source> | ||
| − | $ '''ansible-playbook example_list.yml''' | + | $ '''ansible-playbook example_list.yml''' |
| − | <source lang="yaml"> | + | <source lang="yaml"> |
| − | PLAY [localhost] ******************************************************************************************************* | + | PLAY [localhost] |
| − | + | ******************************************************************************************************* | |
| − | TASK [set var1] | + | |
| − | ok: [localhost] | + | TASK [set var1] |
| − | + | ******************************************************************************************************* | |
| − | TASK [set var2] ******************************************************************************************************** | + | ok: [localhost] |
| − | ok: [localhost] | + | |
| − | + | TASK [set var2] | |
| − | TASK [output var1 type] ************************************************************************************************ | + | ******************************************************************************************************** |
| − | ok: [localhost] => { | + | ok: [localhost] |
| − | "msg": "AnsibleUnicode" | + | |
| − | } | + | TASK [output var1 type] |
| − | + | ************************************************************************************************ | |
| − | TASK [output var2 type] ************************************************************************************************ | + | ok: [localhost] => { |
| − | ok: [localhost] => { | + | "msg": "AnsibleUnicode" |
| − | "msg": "list" | + | } |
| − | } | + | |
| − | + | TASK [output var2 type] | |
| − | TASK [try to loop var2] ************************************************************************************************ | + | ************************************************************************************************ |
| − | ok: [localhost] => (item=foo) => { | + | ok: [localhost] => { |
| − | "msg": "foo" | + | "msg": "list" |
| − | } | + | } |
| − | ok: [localhost] => (item=bar) => { | + | |
| − | "msg": "bar" | + | TASK [try to loop var2] |
| − | } | + | ************************************************************************************************ |
| − | + | ok: [localhost] => (item=foo) => { | |
| − | TASK [try to loop var1] ************************************************************************************************ | + | "msg": "foo" |
| − | fatal: [localhost]: FAILED! => {"msg": "Invalid data passed to 'loop', it requires a list, got this instead: foo,bar. Hint: If you passed a list/dict of just one element, try adding wantlist=True to your lookup invocation or use q/query instead of lookup."} | + | } |
| − | + | ok: [localhost] => (item=bar) => { | |
| − | PLAY RECAP ************************************************************************************************************* | + | "msg": "bar" |
| − | localhost : ok=5 changed=0 unreachable=0 failed=1 skipped=0 rescued=0 ignored=0 | + | } |
| + | |||
| + | TASK [try to loop var1] | ||
| + | ************************************************************************************************ | ||
| + | fatal: [localhost]: FAILED! => {"msg": "Invalid data passed to 'loop', it requires a list, got this | ||
| + | instead: foo,bar. Hint: If you passed a list/dict of just one element, try adding wantlist=True to your | ||
| + | lookup invocation or use q/query instead of lookup."} | ||
| + | |||
| + | PLAY RECAP | ||
| + | ************************************************************************************************************* | ||
| + | localhost : ok=5 changed=0 unreachable=0 failed=1 skipped=0 rescued=0 | ||
| + | ignored=0 | ||
</source> | </source> | ||
Revision as of 21:34, 16 April 2025
Problem: loops were failing when trying to pass a variable with something like "foo,bar" in it. This is just a string with a comma in it.
ansible error: Invalid data passed to 'loop', it requires a list
Solution: enscapsulate with square brackets [ ] and quotes around individual elements.
example:
["foo","bar"]
Example Play
- name: example play showing common loop/list error hosts: localhost gather_facts: false tasks: - name: set var1 set_fact: var1: "foo,bar" - name: set var2 set_fact: var2: ["foo","bar"] - name: output var1 type debug: msg: "{{ var1 | type_debug }}" - name: output var2 type debug: msg: "{{ var2 | type_debug }}" - name: try to loop var2 debug: msg: "{{ item }}" loop: "{{ var2 }}" - name: try to loop var1 debug: msg: "{{ item }}" loop: "{{ var1 }}"
$ ansible-playbook example_list.yml
PLAY [localhost] ******************************************************************************************************* TASK [set var1] ******************************************************************************************************* ok: [localhost] TASK [set var2] ******************************************************************************************************** ok: [localhost] TASK [output var1 type] ************************************************************************************************ ok: [localhost] => { "msg": "AnsibleUnicode" } TASK [output var2 type] ************************************************************************************************ ok: [localhost] => { "msg": "list" } TASK [try to loop var2] ************************************************************************************************ ok: [localhost] => (item=foo) => { "msg": "foo" } ok: [localhost] => (item=bar) => { "msg": "bar" } TASK [try to loop var1] ************************************************************************************************ fatal: [localhost]: FAILED! => {"msg": "Invalid data passed to 'loop', it requires a list, got this instead: foo,bar. Hint: If you passed a list/dict of just one element, try adding wantlist=True to your lookup invocation or use q/query instead of lookup."} PLAY RECAP ************************************************************************************************************* localhost : ok=5 changed=0 unreachable=0 failed=1 skipped=0 rescued=0 ignored=0
